Drop attacks stem from diverse mechanisms, including orthopedic causes (for example, leg weakness and knee instability), hemodynamic causes (for example, transient vertebrobasilar insufficiency, a type of interruption of blood flow to the brain), and neurologic causes (such as epileptic seizures or unstable vestibular function), among other reasons ...
ËpÃ¦l i-) adj. (sometimes l.c.) of, designating, or characteristic of the early phase of the Stone Age: usu. divided into three periods (Lower Paleolithic, c2,000,000âc200,000 b.c., Middle Paleolithic, c150,000âc40,000 b.c., Upper Paleolithic, c40,000âc10,000 b.c.).
Paleolithic Age. From the Greek for Old Stone, the early period of human history, from approximately 2,500,000 to 10,000 B.C., during which humans used simple stone tools; sometimes called the Old Stone Age. Nomad. A person who moves from place to place.